1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A black body at 227oC radiates heat at the rate of 7 cals/cm2s. At a temperature of 727oC, the rate of heat radiated in the same units will be
A
50
B
112
C
80
D
60
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 seconds is S1 and that covered in the first 20 seconds is S2, then
A
S2 = 3S1
B
S2 = 4S1
C
S2 = S1
D
S2 = 2S1
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
If the dimensions of a physical quantity are given by MaLbTc, then the physical quantity will be
A
velocity if   a = 1, b = 0, c = $$-$$1
B
acceleration if   a = 1, b = 1, c = $$-$$2
C
force if   a = 0, b = $$-$$1, c = $$-$$2
D
pressure if   a = 1, b = $$-$$1, c = $$-$$2
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A body, under the action of a force $$\overrightarrow F = 6\widehat i - 8\widehat j + 10\widehat k,$$ acquires an accelerations of 1 m/s2. The mass of this body must be
A
10 kg
B
20 kg
C
10$$\sqrt 2 $$ kg
D
2$$\sqrt {10} $$ kg